Copyholder



F. M. SPERLING COPYHOLDER Filed June 16, 1932 3 Sheets-Sheet l ze Vze;

Afval/Zz?? MMM-y Oct. 4, 1932.

F. M. SPERLNG COPYHOLDER Filed June 16 1932 3 Sheets-Sheet 2llllllllllll @Mor/nego.

Oct. 4, 1932. F. M. sPl-:RLlNG COPYHOLDER Filed June 16111932 5Sheets-Sheet 3 2;@ 2.5 f7 ze Womad-0.

Patented Oct. 4, 1932 UNITED STATES FRANK M. SPERLING, F BRISTOL,PENNSYLVANIA COPYHOLDER rv i Application filed June 16, 1932. Serial No.617,657.

The device which forms the subject matter orp this application is animprovement upon the copyholder disclosed in my prior Mapplication No.597,530, led `on the 8th [Q day of March, 1932.

' In the present application, there is disclosed novelelectro-mechanical means whereby the line-finder will be fed downwardly,step-by-step, bythe` operation of a ,101 switch which may be placed on atypewriting machine, or elsewhere, it being possible tofeed theline-i'inder downwardly by a purel ly mechanical operation, asdistinguished from an electro-mechanical operation, if de- 163 sired.Divers improvements are proposed in the mechanism whereby the line-lnderis carried, and in the mechanism whereby a step-by-step downwardmovementy of they n line-finder is rendered. possible. It is within theprovince oi the disclosure to improve generally and to enhance theutility of devices of that type vto which the invention appertains.

With the abo-ve and other objects in view, which will appear Aas. thedescription proceeds, the invention resides in the combination andarrangementot parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescopeof what is claimed, without departing from the spirit oftheinvention.

In the accompanying drawings:

Fig., 1 shows in iront' elevation, a copyholder embodying the presentimprovements, parts being broken away;

Fig. 2 is a vertical longitudinal section, c wherein many parts areshown in elevation;

Fig. 3 is avertical longitudinal section, parts appearing in elevation,'the observer looking in the direction opposite to that in which he islooking in Fig. 2; Y

,y Fig. 4 is a transverse section, at right angles to the table, lookingat the electro-magnet, and parts by which the releasing member ismounted and actuated;

Fig. 5 is atop plan of the structure depicted' in Fig-.4;

L Fig. 6 is a sectional view, illustrating the inenting Fig. 6 in thedisclosure of one of the stops.

Fig. 11 is a rear view of the electromagnet and parts associatedtherewith.

The device forming the'subject matter of 65 this application preferablyis made of ymetal throughout.

In defining the relative positions of the parts, the words fright andleft will be used under the assumption that the operator is looking atthe forward side of the device as in Fig. 1, and not at the backthereof, unless otherwise specified. c

lThe copyholder which gives rise to this application comprises asubstantially fiat table 1 (Fig. 1) which may be placed as desired. Bypreference, however, as shown in F ig. 2, the table 1 has a backwardslant. Any suitable means may be provided for supporting the table 1,and large latitude is desired in this respect. It may be expedient toconnect angle brackets 2 to the lower part oi the table 1, these anglebrackets being secured to the upper ring 3 of a support 4, including alower ring 5, the rings 3 and 5 being connected, as shown at 6 in Fig.2, in any suitable way, so that the ring 3 and the table 1 which iscarried upon it by means of the angular brackets 2, may be adjustedabout a substantially vertical aXis. The device may be used with thewell-known Morkrum printing machine, which is employed by telegraphcompanies, railroad companies, and others, although the machine may beused not only by railroad and telegraph companies, but by publicspeakers, typists, and others, as well. In the present embodiment of theinvention, it has been pre-supposed, without prejudice to any other use,that the article is to be employed in connection with a typewriter 7,one of the cally adjustable, if desired, that feature being somethinglying well within the skill of a mechanic andrequiring no speciiicshowing in the drawings. Y

VOn the upper edge of the table 1 there are upwardly extended brackets10, to which is secured a transverselyv extended track 11. A

carriage 12 is mounted 0n thetrack 11 for4 sliding movementtransverselyy of the table 1, and is secured'in place,- forreciprocating `movement from right to left and from left to right asshown at 14 in Fig. 2. Near to its right hand end, the carriage-12phas arear-y wardly extended shaft'15 (Figs. 2 and 3), on which isjournaled aflr'o'ller"16, mounted to .move between ythe track 11 and an inverted,

U-shaped guide 17,1carried by the track, the parts 16 and 17cooperatingto'steady the carriage 12 for sliding movement along thevtrack 11. A f

A transversely disposed rack bar 18 is secured toy upwardly' andrearwardly extended parts 19 of the carriage 12. .Bearings 2O aremounted'on the rear side of the table 1, and in these bearings, aY shaft21 is journaled for rotation. A pinion 22 iSsecured to-the upper end ofthe shaft 21 and meshes ywith the rack bar 18 of the carriage 12.; Fortherotation of the shaft A21, at the willof an operator, the same isprovided at its lower end, below `the table 1,'with a turning button23V. I f- I Two parallel, upwardly extended posts 24 yare mounted vattheir lower'en'ds on the car?` yriage 12., 'rlheupper ends of the posts24 are v'connected by a cross piece 25.

piece 25 is received' within a forwardly extended, U-shaped latch 26(Fig.` 3) whichv is pivotally mounted intermediate its ends on the crosspiece 25, as shown at 27. On the forward end of the latch 26 there isalinger piece Y28. A'pull spring 29 (Fig. 2) -is connected to the crosspiece 25 and to the latch V 26, behind thefulcrum 27 of the latch, thetendency of the pull spring being to swing the latch 26 to the right inFig. 1.

A verticallyl adjustable frame, designated generally by the numeral 30in Fig.

1,v is provided, and includes a headblo-ck 31,

which can be slidup and downpat the will of anoperator, on the posts 24of-the carriage 12. The frame 30 is slid upV and kdown by `means of ahandle 32 on the headblock 31.` The headblock 31 carries an upwardlyextended, bevelled keeper 33, adapted to en-- gage automatically withthe spring-actuated `latch 26, when the headblock is raised by means ofthe handle 32, and lby means of the The cross nger piece 28, the latch26 can be tilted, on its fulcrum 27, to disengage the latch 26 from thekeeper 33, and then' the headblock will slide down the posts 24 on thecarriage 12.

The upper end of a guide 34is rigidly secured to a downwardly extendedpart 94 ofthe headblock 31, and the guide extends downwardly along thetable 1, in spaced re, lation thereto. On the lower end of the guide 34,a transverse' arm 35 (Fig 1) is mounted.

A first rack-bar 36 (Figs. 2 and 3) extends downwardly along the table 1in parallel relation thereto. Upon one edge, the bar 36 has ka rack 37,the teeth of which are spaced widely'enough apart to enable the saidrack to Vbe used in connection with typewritten matter that is doublespaced. On the opposite edge ofthe bar36l there is a rackv 38, the teethof which are separated less widely than are the teeth of the rack37-f0rA single space work. In orderthat the bar 36 may be turned on itsaxis, Atopresent either the rack 37 Vor the rack38 uppermost, andinoperative position, the lower end of the bar 361s supplied with a knob40. The lower end portion 95 (Fig. 2) of the bar 36 is cylindrical, andis journaled in the arm 35 on the guide 34, and the upper end 96 (Fig.3),V

of the bar 36 is journaled in a laterally oset bearing 39'on theheadblock 31.

VThe lirst rack bar 36, having the racks 37 andr38von its oppositeedges, is mounted to rotate on itsfaxis, .at the will of an operator.Above the first rack bar 36 is located a second rack bar 41l (Fig. 4)having rectangular, downwardly extended teeth 42 (F ig. 3) on its loweredge, the teeth 42 alternating with the teeth 37 Vor 3.8 of the firstrack bar 36, dependingV upon whether theV teeth 37 or the teeth38k aredisposed uppermost and inoperative position. The second rackbar 41 doesnot turn o-n its axis, but keeps the position shown in'Fig. 2. The upperend of the rackbar 41 is secured to the headblock 31`by means ofan anglebracket 43, which is shown best in Fig. 5. I Vlhelower end of the rackbarf41l is carried byV a post 44 (Fig. 1), and this post is carried(Fig. 2) on the cylindrical lower end 95 of the first, rack bar 36, thesaid cylindrical lower end of the rack bar36 being mounted to rotate inthe post 44. lThepost 44 is located immediately below the arm 35 that ismounted on the guide 34. `A spring tongue 45 is secured to theouter-side of the iixed or` second rack bar 41, as shown in Figs. 7V and2; The spring tongue 45 bears l against the flat side ofthe first orrotatable rack bar36. When the rotatable rack bar 36V is turned on itsaxis, by means of the Vknob 40, to present either theV rack 38Lor`therack 37 of Fig. 3 Y

uppermost, the selected rackwill remain in operative position, becausethe bar 36 is held releasably against turning on fY axis,

:teeniesV` tongue 45.

- A 'slide block 46 is mounted to reciprocate `ontlhe guide. 34, and onthe lower. end of the :5 slide block 46 there is all-shaped extension 47(Figg2), the upper and lower Varms of which'b'ear, respectively,.onv theupper and lower ends of the guide 34 and cause the slide'block 46 tomove smoothly and evenly lmonthe guide 34. On'the upper end of the slideblock 46 there is asimilar extension43, having a like purpose.l

. Figure shows that, in the bottom of the.

slide block 46,. therev is a recess 49. An ad- 153 justingmemberf50, inthe form of a iod, ex-

tends across-the'recess 49 .and has limited adjustment up and down thetable v1, that is,

in-afdirection parallel to the guid-eV 34. VGn the lower end of theadjusting member 50 203 therel is a handle 51, and on the upper end l.of theY adjusting meinberthere is ahead 52,

in which a line-finder 53 is mounted. for longitudinal slidingadjustment, at the will of an operator, transversely of the table 1, as

l 255 Fig. 1 will show. A spring 54 (Fig. 10) is located in the recess49 of the slide block 46, and is secured to theslide block. The springbears on the upper edge of the adjusting member 56.u Taking hold of thehandle 51, the operator Ycanl slide the' member 50 of Fig. 10 up anddown in the block 46, thereby moving the line-finder 53 of Fig. l up ordown the table., the line-finder thus being adjusted manually to theposition of the 355 line on the paper on the table 1. rlhe spring .B4-ofFig. 10 is a friction brake, function-g ing to hold the line-finder 53in any position to which it may have been adjusted, as aforesaid.

405 A paper holder 55 extends lengthwise of the table 1 and transverselyof the line-finder V53, beneath the line-nder. The upper endA ofthepaper holder A55 is connected, as shown inV Fig. 2, to the part 94 ofthe headblock31,`

455 the lower end of the paper holder being connected to the arm 35 onthe guide 34, as Figs.

1 and7 will makemanifest. Y

The upper end of the slide block 46 (Fig. 1) is locatedv within aU-shaped latch lever 5M 56,' fulcruined intermediate its ends at 57(Fig.V on the Y slide block. The downward movement'of the upper end ofthe latch lever 56 is limited by a stop 58 on the slide 55? block. lnthe upper endV ofthe latch lever 56 is secured a transverse finger 59,which as shown in Fig. 3, is of angular form.Y The transverse finger 59has a thinned end 60 (Fig. 9) which, when the lever 56 is swung 6,05 upand' down on its fulcrum 57 ,moves up and downbetwecn the teeth of thesingle spaee'rack 33 on the first or rotatable rack bar 36 and the teeth42 of the second or fixed rack bar.41f: or between Vthe teeth 42of-the65E rackbar 41 and the teeth 37 of the rack bar 36, if'the teeth 37 areuppermost, for double spacing.

A laterally offset shaft 61 (Fig. 1) extends lengthwise of the table 1,across and above the linger 59 (Fig. 8) of the lever 56, inwardly of thethinned end 60 of the linger. It is shown in Fig. 7 that the lower endof the shaft 61is mounted to rock in the post 44 of Fig. 2. Referring toFig. 3, the upper end of the shaft 61 is journaled in the bracket 43which connects the rack bar 41 to the headblock 31. lThroughout themajor portion of its length, the shaft 61 is parallel to the second rackbar 41, the guide 34 and the paper holder 55, as Fig. 1 will show.

A releasing member 62 extends lengthwise of the table 1 (Fig. 1) and islocated underneath the finger 59 (Fig. 8) that is carried by the latchlever 56. At its lower end, the releasing member 62 has a laterallyoffset arm 63 (Fig. 7) which is pivoted to the transverse member 35(Fig. 1) on the guide 34. rEhe arm 63 of the releasing member 62 has alaterally extended finger piece 64, shown in Fig. 1, and employed tooperate the releasing member manually, although the releasing` membergenerally is actuated by an electro-mechanical means connected to thetypewriter fra-me bar 8, and described hereinafter.

Secured to the upper end of the releasing member 62 is a hanger 65 whichis U-shaped in top plan (Fig. 5). The upper arm 66 of the hanger 65, is,in substance, an arm on the releasing member 62, like the lower arm 63of Fig. 7. rllhe arm 66 is pivoted at 67 (Fig. 4) on the headblock 31.lThe lower arm 69 of the hanger on the releasing member 62 has a notch 7O (Figs. 4 and 1) that receives the crank or offset portion of the shaft61. A;

pull spring 71 is connected to the lower part of the hanger 65, belowthe pivotal mounting 67 of the hanger, and to a part 72 of the paperholder 55. An angular stop 97 (Figs 5 and 11) is secured to the upper orback side of the arm 66 of the releasing member 62, and has areaiuvardly-extended end 98, located above and about parallel to theupper surface of the headblock 31, the end 93 of the stop workingbeneath a guard 99, superposed on the bracket 43 and secured, with thebracket, to the headblock 31. Noting the arrows in Fig. 11 and the pullspring 71 of Fig. 4, it will be clear that as the spring 71 tilts theupper end of the hanger 65 to the right in Fig. 4, on the fulcrum 67, tolower the releasing member 62, the end 98 of the stop 97 will engage theupper surface of the headblock 31, and terminate the movement of thehanger 65 and the releasing member 62. Noting the electro-magnet 7 4 ofFigs. 4and 5, to which the hanger' 65 is responsive, as hereinafterexplained, lit will be understood that as the electro-magnet causes theupper end of the hanger 65 to swing to the left in Fig. 4, the end 98 ofthe stop 97 will engage the upper surface of the i headblock 31V andterminate the ino'vem'ent of v the hanger and the releasing member.Y

Itk is Ashown in Fig. that an Varmature ,Y 1 713. is mounted on theupper arm 66 of the 5- hanger 65 and isinsulated therefrom. The.

armature 73 is responsive to the aforesaid electro-magnet 74, which ismounted on the headblock 31. The `ends of the winding 75 (Fig. `1) ofthe electro-magnet 74 are connected to spring tongues 76 carried bybrackets 77 on the headblock 31,;the tongues 7 6V being insulated fromthe brackets. The spring tongues 76 bear against conducting standards78, mounted on the carriage 12, but insulated therefrom. To the upperends of the standards 78 are joined conductors 79 lleading to a normallyopen electrical switch 80, mounted .the shelf 9, and are held down,nearto the right hand margin, by the paper holder 55. The line-finder 53is under the lineof matter which is being copied, and casts no shadow.The paper holder 5,5 can be adjusted readily, Vto the left or to theright, so as to hold down the papers, and at the same time obscurelittle or none of the text. The adjustment of the paper holder 55, ytothe right or to the left, is brought about .by turning thel button 23of'Fig. 1, the shaft21 being rotated, and the pinion 22fon the shaftcooperating with the rack bar 18 of the carriage 12, to move thecarriage to the left or to the right. Vlhenl the carriage 12 is movedtransversely of the table 1, the frame 30 (which'includes the paperholder 55) isl moved laterally, also, because the headblock 31l of theframe 30 is carried by the posts 24 of the carriage 12, as vthe carriageslides on the track 11. rllhe frame 30 may be adjusted vertically,through Y the medium of the handle 32 on the headblock 31, because theheadblock 31 of the frame can slide vertically on the posts24 of thecarriage 12. ylhis vertical adjustment of the frame 30 and of the paperholder 55 of course enables thevr paper holder to cooperate with thestack of papers on the tablel, regardless ofthe heightof the stack. Theheadblock 31, and parts carried thereby, are heavy4 enoughV to causethe. paperholder 55 to have a firm pressure on the stack of papers.

When the frame 30 is elevated by the handle 32, as theheadblock 31slides upwardly on the post 24 of the carriage 12, the beveledv keeper33 on the headblock engages automaticaliy Yizvtlfdi'e) iat-@526mmi's-pvotci at 2T on@ the cross piece and is actuated by the spring 29.The latch 26 may be swung manually by means of the linger piece 28, toydisengage the latch 26 from the keeper 33 and let `the frame V slidedownwardly onfthe posts 24 of the carriage 12, to the position of Figs.1 and 3.

' As to the up and down transverse adjustmentof the line-finder 53,relatively to the si'ldeblock 46, as distinguished from the movementbrought about when'the block 46 is. slid bodily along the guide bar 34,lit will be clear, when Figsl() and-2 are compared, that `all that theoperator has todo is to move the member (which carries the line-finder53)- up or down in the-slide block 46, the said member beingfrictionally held in its adjusted position by the'spring By means oftheknob 40, thejsecond rack Y Bll bar 41 may be reversed on-its axis, tobring either therack l38 or the rack 37 ofFig. 3 uppermost, dependingupon whether the matter to be copied is single spaced or double spaced.n v

Referring, first, to the'operation of the latch lever 56 of Fig'. 3,inconjunction with Fig. .A8, Yand disregarding for thek moment the remotecontrol lof the latchlever, it will be clearA that as theupper end ofthe latch lever 56 is raised, the thinned outer end 60 of the finger 59on-th-e latch lever will move out of the rack 38 on thebar 36 (Fig. 9),into engagement with the teeth 42 of therack bar 41 and when the upperend ofthe latch lever 56 in Fig. 3 moves downwardly, the thinned endofthe finger 59Vwill engage with the next lower tooth 38 of the rack bar36, the slide blocky 46 .moving downwardly one stepV along Vthe guide34,and the line-finderl 53 being carriedk downwardly one step, accordingly.

In the preceding paragraph, reference has.

been made to the remote controlof the latch lever 56 andthe linger 59 ofthe latch lever. rlhere are two' remote controls, one being purelymechanical, andthe other being electro-mechanical. The purely mechanicalcontrol willbe discussed first, notbecause it is of primary importance,but because it is the c simpler of the two, and forms abasis from whichthe description of the operation of the electro-mechanical control canbe built up.

Referring to Fig. 1, and noting the linger piece 64 on the arm 63 (Fig.7) of the releasing member 62 (Fig. 8) it will be understood that whenthe nger piece 64 Vis pressed downwardly, the releasing member 62 willbe raised, Vthe releasing member swinging upwardly o-n its pivotalconnection 64 (Fig. 7) with the arm 35 at the lower end of thel guide34, and on the pivotal connection 67 (Fig. 1) between the hanger and theslide block 31, it being recalled that the hanger 65 is, in substance,an offset a-rm onthe releasing mem- 1-lcated above the finger59,1ser'ves to keep the end 60 of the finger 59 engaged with the rack jb.er62,resembling the lower arm 63 (Fig: 7

' of the releasing member.

,Asthereleasingmember 62 8) moves upwardly, it raises the thinned end 60of the linger 59 out of engagement with the rack 38 38 ofthe bar 36, butwhen the releasing member 62 is raised as aforesaid, the shaft orholding member 61 willl be raisedalso, per-` mitting the end 60 ofthefinger 59 to rise out of therack` 38 lon the bar 36... The raising of,

theA holding member 61 is `brought about by the lower arm 69 of thehanger 65, the offset partof the shaft 61 beingreceived slidably in thenotch 7 O of the arm 69; y, The hanger Y65, including the part 69 is,'insubstance, an arm on the lupper end of the releasing member 62, andresembling,in broad function,

the arm 63 shown on the lower end of the re-y leasing member 62 -inFig7. As thehanger 65 and-its arm 69 swing upwardly, on the pivotalconnection 67V (Fig- 1) betweenthe hanger' and the headblock 31, theholding member 61 of Fig. 8 will be raised at the same time that thereleasingvm-ember 62 .is raised toV release the part ofthe finger 59from the rack 38 on the bar 36.V Nhen the operator relieves the pressureon, the finger piece 64 of Fig. 1, the parts will resume the po-v sitionof Fig. 8, under the pull of the spring 71 of Fig. 4, the said springbeing connected tothe hanger that carries the upper end of the releasingmember 62, and to the bracket 72 on'the headblock 31.

The description'iabove concluded relates to the purely mechanicalcontrol of the step-by- Y step downward movement of the slide block 56and the line-finder 53. Passing to the electro-mechanical control, itwill be observed that 'when the operator closes the switch 80 on theframe 8 of th-e typewriting machine 7,

by means of the push button 81 of Figs. 1 and 2, an electrical circuitthrough the winding 77 of the electromagnet 74 is closed, the magnet isenergized, the armature 7 3 on the hanger 65 (which carries thereleasing member 62) is attracted by the magnet 74, and the sameoperation takes place as occurs when the parts are actuated by thefinger piece 6l. A comparison of the finger piece 64C and the armature 73 inv Fig. 1 will indicate at a glance, their similarity in function.

rThe circuit that is closed by the push button81 of the switch 8Oincludes the conduc- Vthe push button 81 of the switchV 80 is located Yclosely adjacent to the keys ofthe typewriter 7, andcan be operated aseasily as any of the standard typewriter keys, or the spacing bar of thetypewriter.

What is claimed is 1. In a device of the class described', apaper-holding table, a gravity-actuated slide, means for mounting theslide for movement downwardly along the table, a linefinder carried bythe slide, mechanism for limiting the downward movement of the slide andthel line-finder to a step-by-step progression, said mechanism includinga movable actuating part for said mechanism, electro-mechanical meansfor operating said actuating part, and a device for controlling theelectro-mechanical means from a remote point.

2. A device of the class described,y con-V structed as set forth inclaim 1, and further characterized by the fact that theelectromechanical means comprises an electro-magnet supported .from thetable, an armature on said movable Vactuating part and responsive to theelectro-magnet, a circuit including the winding of the electro-magnet,and said device being a switch interposed in said circuit.

3. In a device of the class described, a table, a gravity-actuatedslide, means for mounting the slide for movement downwardly along thetable, a line-finder carried by the slide, a rack supported by thetable, a latch cooperating with therack to limit the downward movementofthe slide and the line-nderto a step-by-step progression, means formounting the latch movably on the slide, cooperating parts including amember .holding the latch engaged with the rack and a member engagingthe latch to disengage the latch from the rack, means for supportingsaid cooperating partsmovably with respect to the table, interengagingelements on said cooperating parts formoving them in synchronism whenone of them is actuated, and means for actuating one of said cooperatmgparts.

LA vdevice of the class described, con.-`

as Y,

the downward movement of theA slide and the line-finder to astep-by-step progression, means for mounting the latch movably on theslide, a pair of shafts having cranks located on opposite sides ofthelatch, theV movable tomove'thelatcli Ybe,-` tween the' ncranks,longitudinally of the shafts, kmeans for mounting the' shafts forVgrocki-ngmovement, means for Connecting the v.shafts operativelytogethenand means forVA 'operating one sha-ft.V

6..'A device V.of the class described, con- `stifuctedas set forth inclaim 5, and further characterized Vby the fact that the means for v4connecting the shafts operatively together is a transverse arm on oneshaft, the arm being 'engaged with the'crank ofthe o therl "shaft A H ii l7.-'fIn a device ofthe class described, aV Vtable,"a guideextended-along the table, a slide mounted to reciprocate upon the guide,

means for controlling thel movement of the slide, a line-finder, andmeans for mounting Mthe line-finder v`on Vthewslide Lfor adjustment withrespect to the slide, transverselyyof the line-findendand longitudinallyof the guide. y

fio

" 8. Inj a device of the; class describeda table, guideV extended valong the table, faslidemounted togreciprocate upon thel guide, meansfory controlling,.the/movement of the slide, an operating `membermovable in the` slide, at theqwill of operator, in a directionsubstantially parallelto the guide, a l eline-Ender disposedtransversely of the guide` and carried'by the operating member, andmeans fory holding the operating member in adjusted positions withrespect to the slide.

ably, mountedgonithe slide and cooperating one@ posts, a keepercalamity. @he Bead! block, across piece connecting the posts, a Y

latch movably moun'ted'vonv the cross piece, spring means foroperatingthe latch to hold' itin the pathof the'keeper, when the head-Yblock is moved upwardly yon-the post's,a line nder cooperating with thetable,`and means forfmounting the line-finder Von the headblock.v I y v12. In a device of they class described, a tafor movement with respectYto the table, aline` linder carried by ltheslide'and cooperating withthe table, a' latch movablyv mounted onv Y.the slide, afirst'racklocated below the. latch and having lines of teeth, the teeth.ofthe lines being` differently'. spaced, means for mounting the., firstrack for axial rotation, to present either line of teeth to the latch, asecond raclrand meansfor mounting the second rack .abovethelatch, the.secondfrackv having teeth which alternate with the teeth of both Vlineson the first rack, and means un-y der the control of anoperator foractuating the -latch to causevthe latchgto move between Y the teeth ofthe selected line on the first rack andthe teeth ofthe second rack.v l YY 13. In a device ofthe class described, atabl'e, a gravity operated,releasable line-nder,` means for mounting the line-finder forvmove mentwithv respect tothe table, mechanism. Vfor constraining the'movement ofthe linefinder to a step-by-step` movement,-when the 71'5 y, ble, aslide, means for Asupporting the, Slide L p soi line-finder is released,andan electro-'mechanf .00

ical means accessiblefrom a remote pointand under the control'ofanoperator for releasing the line-finder. Y v 1 y In testimony that Iclaim the. foregoing as. my `own, I have hereto affixed my signature.

- FRANK M. SPERLING.

with the rack tol-limitfthe movement of the n s slide toa stepby-stepprogression, a shaft inr-k cluding a `crank portion engaged with] the`Vlatch to disengage the latch from the rack, the

shaft including arms, one of which is pivoted f to the headbloclr7 theother of which'is pivoted e to the'means for mounting the slide, meansfor rocking the shaft, and a stop carried bythe first specified one ofsaid arms and engaging the headblock tov limitl the movement of theVshaft.

10.7A.kv device of the class describedfccinnstructedy asY set forth inclaim 9 and furtherk characterized by thefact that the'means for vrocking the shaft-embodies an armature onfV said one of the arms, fandanrelectro-ymagnet.

O nthe headblocl, the armaturebeing responp sive to the electro-magnet.

l1. j-A device of he class Vdescribed compris- Y ing fa table, acarriage movable transversely of ,the table, means formoving thecarriage `V`4transversely of the table, posts mounted on Y l'the"carriage, a headblock slidable vertically y lso

